Jar-molding machine



pt 13 1927 w. I Ewls JAR HOLDING MACHINE Filed May 17, 192.2` 2 sheets-sheet 1 PQLJM vol 011 4 i 17, 4;/

Sept. 13, 1927. w. LEWIS j JAR-HOLDING MACHINE Filed May 1'?, 1922 '2 Shets-sheet 2 I Patented sept. y 13, 1927.

TWIBFREDLWI'S,OF'HVRFORQ PENNSYLVANIA, AssIGfNORTO THE TABOR MANU- OI PHILADELPHIA; APENNsYmraNIA, `A CORPORATION 0F Applica-tion vfiled -May 17,1922. Seria1-No.-561,69'0. it

YMy linventionrelates to jar vmolding ma- .its features, exclusively, to the ytype of machine known as --shockl'ess ,'jar molding v'mav chines. The objects-of my invention are, -in vthe flirstiplace, to provide.; improved means 4for supporting the anvil of a .shockless mavchine on a-cushion or springof-compressed :air vwhich lis automatically maintained at -such volume and pressure asto avoid all danger `of .forcingfthe anvil too -far upward. The otherobjectwhich-lhavelin View and Whic`h,` while especially adapted for Vuse-with feshoc'kless lmachines, can yalso be rusedv with other types of machines vin which the jarring table is vactuated by` compressed air through -a'icylinder and''piston-is, to conductthe `exhaust air-through afpassage'v formed in the anvil kand connect `-it gwith a delivery port opening inzthespace betwee'ntheanvil and thezjarringctable so that the constant throwing-of lair jetslacross Lthe top of theanvil -Willkeepitclean'andprevent the collectlon O' impacted `sand -v and dirt on vtop ofthe anvil which yis apty to' occur when Ano means larefem'ployedfto prevent it. y

The nature otV my c improvements and the best. y'mode "1in :whichI have `pla-nnedto embody them-in amaeh-ine-will bebest under- 30 stood asi-described `in connection with the draw-ings in whichl they are illustrated and in which Figure -1 is a vertical' sectional elevation through a `shockless :jarring machine emv bodying my improvement. Y

Figure 42 .is `rsimilar `view on a smaller scale :showing the jarring table in lelevated `position and the valves'flMtand "N2 the positions 1 they occupy when i the 1 table `1s so 'positionedland I' Figure Bis an-enlarged-Ascale'view of the valves M4 andN2'a-ndytheir coacting devices.

yofthisoy'flinder on Nwhichthe anvil rests when air is exhausted from the cylinder;=B, a stufting -box Vatv the open top fof; the cylin- 'der. QG, an -fanvil piston -fworking `in 'the cylinder A and, ias vrshowin-aand --for convenience vin --constr-uction K4of fmachine5 "made in two parts5 Gland'v C1, theseparts being-firmly secured together by Aany lconvenient i mechanism. lC2'is1a cylindricalspaceformed in the center Vof "the anvil piston anid nclosed-at 1bottom,assh0wn-,by ya yblock or head indid cated at D and firmly lsecured vin .placeto cl-lines and particularly, though lnot inall of and at the .bottomvofrcylindrical space C2.

' E 1s an exhaust port leading from the cylindrical I,space C2 through vthe head D and vformed `witha valve seat e atits top. This port E connects with exhaust passages indicated at F11, F11,.formed in the anvil piston 1and-connected, as E3 and E1 withan E5 formed on the shown, through passages annular recess or chamber inside of the y cylindrical ,space'C vF11 is an exhaust port leading into the'exhausttpassages E1 throudh the bottom of the anvilipistom said port eing .formed with a valve seate 2 lat its lower Yend. F is a hollow piston ttingandnvertically movable -in the cylindrical tight .fit therewith space C2 and forming a at its lowerend through ,packing rings, as shown. This hollow piston 1s formed with ports indicated at F1 which keep-itsh'ollowrcenter in communicaition with the cham berAF-and is further provided y with outletports indicated at F2 which openflnto the space Aat the topof'the anvil vand the jarring. table, and through thisspace exhaust to the atmosphere. G indicates the jarring table secured to the uppery end ofthe piston F, :as shown, and G1 is the usual cushion employed between the anvil and the jarring table .and constituting.essentially the gtopiv of the anvil.

H is a valve casing located in the bottom of the lixed cylinder yA yand opening at top Iinto thiscylinder t hrough Y a` passage formed,

as shown,v in an Yannular.gland nut-H1 hav- 1 ing ra y'valve y seatlt1 Kat its lower-edge. I' is a hollowlcylinder extendingthrough the vertical opening in the valve casing H and formed with an annular valve 111- adapted to .seat itselfvon the seat-h1. The hollow cylinder Iywhich constitutesthe valve spindle is formed witha shoulder I2 and provided at fitstop with a cylindrical nutI3 which forms an Aupper vshoulder for the cylindrical porfA?, being istoolsaor shoulders'lin the bottom `tion-I4E of the valve .stem which extends betweenl the shoulders lf2v and 13.

J is a valve able ,betweenV the -a it upward and K1 stopsfIg-and I3. K is a .spring `acting. against the valve L I1, to ,press is a spring acting against '.the head .YJ 2vto. press in its stem-J1. and valve J upward. Y

Lk indicatessa 4va lve casing Secured iny the lill) bottoni of the hollow piston F shown, said casingl being,Y closed at top by block Ll and opening at its lower end into the bottom of the cylindrical space C2, the outlet passage .L2 beingl formed with a valve scat Z2, as shown. M is a casing `guided .in the casing L and vertically movable therein, the casing lil being;` closed at top by a cap M1 and havingr at bottom a sleeve M at the bottom ot which is 'Formed a valve lvl'L adapted to seat itself at proper times en the valve seat Z2. M2 are openings through casing;4 lil. l( is a piston vertically movable in the casing lll, this piston being hollow and formed with if the piston rod extensioirv7l at the bottom of which extension is lorn'ied a valve N2 adapted to seat itself on the seat e et' thc exhaust port lil. N3, N1", indicate openings through the sides et the hollow piston rod N1 and l" a spring;l supported on the piston rod and actingl against the cap N1 ot the cylindrical casing. This particular valve con* struction is shown simply as one well adapted lor its purpose and Aterms in itself no part ot my present invention.

indicates a conduit from the source et air under pressure; i l a valve in said conduit leading to a conduit section U2, trom which in turn leads the pipe O coimectinir,

` as shown.` with the valve casing' ll. Ait the top ot the conduit section O2 is a valve Ot through which the conduit is connected through a flexible section (Y, and sections (7) and O" moving with the piston F, with the too ol the valve casing` L.

lVhen it is desired to start the apparatus, the anvil C, it maybe assumed is in its lowerinost position, resting on the stools or ledges U and A2; in this position the piston rod dl is forced downward and through itshead d'2 presses down the hollow valve stem l, maintaining` the valve Il widely open while, oit course, the valve J is lirmly held against the valve seat e2. The valve (l2 is then opened and air under pressure admitted through conduits O2 and O into the valve casiiigg,l H from which it passes freely through the open valve port into the bottom ot' the cylinder il, moving upward the anvil pistion C which, as it moves upward, permits the upward motion of the hollow valve stem l of the 'alve l1 until said valve is seated, cutting` oil further admission et air to the cylinder A, and it will he obvious that after the closing;` ot the valve Il the anvil piston (l may still move 'farther upward for a disstance correspending to the distance hetween shoulder-,s l2 and l before the Contact ot head .l2 of the valve stein J1 with shoul der 13 will arrest the upward motion of the valve J. after which an upward motion of the anvil piston will cause the valve l to leave its seat and permit the escape ol pressure air through the port E2 into the passages El and thence through passages E2 and E4 to chamber E from which it passes through ports F1 into hollow piston F and through ports F2 to exhaust over cushion (il. lt is also obvious that the anvil piston cannot be forced farther upward by the air under pressure as at the described height the port E2 is always opened and the air permitted to exhaust. ln moving` as described the anvil C oit course carries with it the hollow piston F.

rlhe proper amount ot air to -torna a resil ient cushion or springl to support the anvil piston having been admitted, as described, and the anvil raised by the air to a proper height, the valve Ot is opened and the air admitted under pressure to the valve casing L, the piston F carrying this valve casing being, of course, in its lowerinost position, as shown in Fig. l oit the drawing, with the valve N2 closing' the exhaust port E and the valve ht* open, for the reason that the spring EN* acts to press the cylindrical casing,` M to its uppermost position. The air will, theretore, flow through the casing; L and the port Z2 into the lower end of the cylindrical space C2 below the piston F with the result, ci course, that the piston F is moved upward and while the piston F is movinsgi,` upward the casinav :il and parts connected with it remain stationary and exhaust valve N2 remains seated until the valve M4' comes in contact with the seat Z2 cutting; oit the ad mission of air to the cylinder C2. A tui ther upward movement of the piston F lifts the valve N2 from its seat on the exhaust port and at the same time through the openings lll permits the pressure air on the inside ot the hollow "alve stein and the top of the casing;` lil to exhaust whereupon the pressure air which has entered the portion ot the cylinder below the piston N through openin'l M2 termed in the wall et the cylin der M iorees the valve stem Yl rapidly upward insuring the prompt opening,l of the exhaust port.

ln Figs. 2 and the jarring` table shown in its upper position, thevalve Mft seated on port Z2 and valve N2 slightly li'l'ted troni seate. Immediately alter the parts reach their positions the pressure air in casing L entering cylinder M through ports M2 forces piston N to the top et casingr M so that as the table and piston F tall the air in cylindrical space G2 escapes freely through port E until the parts again occupy the position shown in Fig. l.

It will readily he understood how the admission and exhaust of air under pressure to and trom the cylindrical space C2 causes a reciprocating movement ol' the jarring table and ot the air supported anvil and it will he obvious that in the construction shown the exhaustlair is carried through the described ports and passages o'l' the hollow piston F to the ports F2 through which it passes into the lll) space between the anvil and the jarring table, const-antly sweeping away any sand or dirt. which may get into this space and keeping -the contacting faces clean.

. ing a cylindrical space formed in it together with a chamber having openings connecting it with the upper portion of said cylindrical space and an exhaust passage leading from the base of the cylindrical space through the anvil to said chamber in combination with a rhollow piston working in the cylindrical space, a jarring table supported on said piston, said hollow piston having two sets ot ports opening through its walls, one set located to register with the chamber ormed'on the inside of the cylindrical space andthe other set located to register with the space between the face of the anvil and the jarring table.

3. In a shockless jar molding machine comprising a iixed cylinder, an anvil moving therein and formed with a cylindrical space within it for the jarring table piston, a jarring table piston moving in said cylinder and a jarring table supported thereon, means for admitting and exhausting air under pres- '.sure to and from the fixed cylinder and the cylindrical space, exhaust ports Vone leading from the bottom of the cylindrical space in the anvil and the other formed in the bottom` ot the anvil opening into the fixed cylinder, an exhaust passage formed in the anvil into which said ports open, valve mechanism carried by the jarring table piston operating to alternately admit pressure air to the cylindrical space in the anvil and to open the ex haust port from said cylindrical space, va valve casing located in the tixed cylinder connected with a source of pressure air, said casing having a port leading into the xed cylinder, a valve for openingand closing said port normally moved toward its seatl by resilient means, means tor opening said valve actuated by the downward movement of the anvil beyond a determined level, a valve normally held seated on the exhaust port in the bottomV of the anvil by resilient means and a stop operating to prevent the upward movement of said valve beyond a determined height so as to open the exhaust port when the anvil moves above said point.

4. In a shockless jar molding machine comprising a ixed cylinder, an anvil moving therein and formed with a cylindrical space within it-for the jarring table piston, a jarring table piston moving in said cylinder and a jarring table support-ed thereon, means for admitting and exhausting air under pressure to and from the fixed cylinder and the cylindrical space, exhaust ports one leading from the bottom of the cylindrical space in the anvil and the other formed in the bottom of the anvil opening into the fixed cylinder, an exhaust passage formed in the anvil into which said ports open, valve mechanism carried by the arring table piston operating to alternately admit pressure air to the cylind rical space in the anvil and to open the exhaust port from said cylindrical space, a valve casing located in the iixed cylinder connected with a source of pressure air, said casing having a port leading into th-e fixed cylinder, a vertically movable valve for opening and closing said port normally pressed upward to close position by Aresilient means, a valve opening rod longitudinally movable bet-Ween stops in the valve stem, resilient means acting to press said rod upward and a valve on the end of said rod normally seated on lthe exhaust port in the bottom of the anvil. 

